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Fat Sass Switchback Challenge

Name: Fat Sass Switchback Challenge
Start: 2025-10-05
End: 2025-10-05
Location: Millburn

Millburn, United States • 5 Oct 2025

The Fat Sass Switchback Challenge is a trail running event held in Millburn, New Jersey, at the South Mountain Reservation's Locust Grove Picnic Area. Scheduled for October 5, 2025, it features a challenging 1-mile loop course with 300 feet of elevation gain, including steep climbs and technical, rocky trails. Participants can choose from a 5K race (three loops), or 3-hour and 6-hour endurance challenges, completing as many loops as possible within the time limits. The event promotes a BYO (bring your own) approach with water and bibs provided but no swag or awards. It supports Bigger Than The Trail, a nonprofit offering free mental health therapy. Visit the organization's website for the most recent information.

United States New Jersey Millburn

Race information

Website Registration

6 km

6 Hours

3 km

3 Hours

5 km

Visit the organization's website for the most recent information.

Trail runs nearby

Saturday Aug 23

Dirty Dozen 50k

Queens County - 26 mi from Millburn

50 km

The Dirty Dozen 50K is a challenging ultramarathon held in Forest Park, Queens, New York City. The race features a 2.5-mile loop along the scenic Orange Trail, completed 12 times for a total of 50 kilometers. Each loop includes 300 feet of elevation gain, making the course deceptively tough with rol..

Sunday Aug 24

USATF-NJ Open & Masters 5k Cross Country Championships

Peapack and Gladstone - 18 mi from Millburn

5 km

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Saturday Aug 30

Barn-B-Q Trail Festival

Berkeley Heights - 6 mi from Millburn

2 mi

3 mi

6 mi

The Barn-B-Q Trail Festival, held in Berkeley Heights, NJ, is a unique outdoor event combining trail running, hiking, and a lively barn party. Set in the historic Deserted Village of Feltville within Watchung Reservation, participants can enjoy self-guided trail tours ranging from 2 to 6 miles, with..

Saturday Sep 6

FallApple - South Orange, NJ

South Orange - 3 mi from Millburn

...

The FallApple is a trail running event held in South Orange, New Jersey, at South Mountain Reservation. Scheduled for early September, the race offers a variety of distances including 5K, 10K, half marathon, marathon, 50K, and 50-mile options. The course features a mix of fire roads, single-track tr..

Sat - Sun Sep 20-21

Wild Goose Trail Festival

Hewitt - 30 mi from Millburn

...

The Wild Goose Trail Festival takes place at Wawayanda State Park in Hewitt, New Jersey, offering a variety of trail running events over September 20-21, 2025. Distances range from a 1-mile kids run to a challenging 100-mile ultramarathon with a generous 36-hour cutoff, making it ideal for first-tim..

Saturday Sep 27

Front Runners New York Cross Country 5K

Bronx County - 25 mi from Millburn

5 km

The Front Runners New York Cross Country 5K is an annual running event held at Van Cortlandt Park in the Bronx, New York. Celebrating its 22nd year in 2025, the race offers a scenic 5K cross-country course through the park's fall landscape. Participants meet at the iconic Tortoise & Hare Sculpture f..